Elastic-fluid turbine



G. W. PENTHENY AND V. PETROVSKY.

1 Hill! ELASTIC FLUID TURBINE.

APPLICATION FILED AUG-2| 1919.

Patented Jan. 25, 1921 Fig.2.

lnven tors George W. Pent. hen

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GEORGE w. PENTHENYJOF]SlPRINGFIELD,ANDYYACHESL AV PETROVSKY, or LYNN,MASSACHUSETTS, ASSIGNORS TOG-ENERAL nnnc'rmc- COMPANY, A CORPORATION'QFNEWYORK: w f

EL STIC-FLUID TURBINE.

- Specification of Letters .Patent. Patented J an 25 1921 Applicationfiled Au usta, 1919. Serial in. 314,997;

To all whom it and concern siding at Springfield, county of Hampden,State of Massachusetts, and VYAoHEsLAv PErRovsKY, a citizen of theUnited States, residing at Lynn, county of Essex, State ofMassachusetts, have invented certain new and useful Improvements inElastic-Fluid Turbines, of which the following is a specification. r

The present invention relates toelastic 'fluid' turbines andspecifically to the construction of the rotor and the means for at 15taching buckets or blades thereto and has for its object to improvetheir construction. Fora consideration of'what we believe to claimsappended thereto.

In the drawingwhich' is illustrative of our invention, Figure 1 is apartial axial section of a bladed rotor and Fig. 2 is a partial view inelevation of the same.

3 indicates the main body of a rotor having supporting shaft. The rim ofthe rotor is somewhat enlarged to furnish the necessary support for theblades 5. The rim is provided with a plurality of concentric shoulders6, said shoulders having relatively large,

' flat concentric bearing surfaces 7. As shown the faces ofsaidshoulders all terminate in the same vertical plane but this is not essential' The rim is beveled off at 8 to permit it to enter a recess inthe blade bases as willappear later. The rim is also provided with anannular undercut recess 9 and an annular .retaining shoulder" 10. Thelower ends of inner end of the blade base is beveled at its inner endand oppositely to the side wall of the recess so that the calking stripwhen finally forced into place is tapered on-both sides, a feature whichaids in holding it in place against centrifugal stresses.

The blades 5 are formed individually as by the drop forging process forexample, or they may be cut out of solid stock. However they are made,each blade has a base 12 formed integral therewith which also forms aspace block to properly separate the working surfaces of the blades.mach base is providedwith a plurality of concentric shoul- I ders 13which are thej counterparts ofthe Be it"known that we, GEORGE LVV. PEN-i'T ENY, a citizenof the United States,re-

shoulders on the rim and when assembled are in firm contact. 'Theshoulders on both the ,blades' and rotor 'are'surfaces of revolutionprovided with a'recess 15 and a shoulder 16. Located in the recessbetween the shoulder and the rim is a calking strip 17. The

calking strips 11 and 17 are made in sections of suitable length and areforced into place by a suitable calking tool,. Each calking strip maycover an arc equal to one blade or it may cover two or more blades asdesired.

The blades with their bases are finished individually and are mounted onthe. rim

one after the other, the recesses 9 and 15 permitting this to be donefrom one side of the rotor, after which they are locked in place by thecalking'strips. The blades can be removed by taking out the calkingstrips, a feature which is desirable for repair pur- :poses.

. ing the blades against centrifugal force. The

overlapping of the shouldered portions of the bases and rim togetherwith the calking strips 11 and 17 located on opposite sides of the rotorand at different radial distances from the rotor axis afford aneffective means for resisting strains due to the action of the steam onthe blades.

In accordance with the provisions of the patent statutes, we havedescribed the principle of operation of our invention, together with theapparatus which we now consider to represent the best embodimentthereof; but we desire to have it understood that the apparatus shown isonly illustrative, and that the invention can be carried out by othermeans. i

What we claim as new and desire to secure by Letters Patent of theUnited States, is,-

1. In combination, a turbine member having a plurality of concentricallyarranged projections on one only of the side faces of its peripheralportion, the other side face being smooth, blades provided with baseswhich have similar projections on one side only, said projectionsinterlocking with those on the member and retained thereby, and a'ineanson-op'posite sides of the member for locking the blades in place.

2. In combination, a turbine rotor having a rim with a shoulder on oneof the side faces thereof, blades, each of which has a base providedwith a shoulder on one of its side faces which engages that'on therotor,

andmeans on oppositesides of the rotor and at different radial distancesfrom the rotor axis for holding said shoulders in enagement andresisting lateral stresses on the blades when they are subjected to theaction of motive fluid.

In combination, a turbine rotor having a rim with a shoulder on the sidethereof, blades, each of which has a base provided with a shoulder onone side which engages that on the rotor, and calking strips located onopposite sides of the rotor and at different radial distances from therotor axis for holding said shoulders in mutual engagement and resistinglateral stresses on the blades when they are subjected to the action ofmotive fluid.

4;. In combination, a turbine rotor having a rim with a shoulder on itsside face and also a circumferential recess to receive the inner ends ofthe "blade bases, blades, each of which has a shoulder on its basecooperating with that on the rotorandalsoare' cess to receive theperiphery of the rotor, and retaining devices located in said recessesfor holding the blade against lateral displacement.

5. In combination, a turbine rotor having a tapered .rim portion withaplurality of" concentric shoulders on one of itsside faces, blades, eachof which has a tapered base portion with shoulders which cooperate withthose onthe rotor, and means located adj acent theends of said taperedportions and at different radial distances from the rotor axis forholding the shoulders in mutual engagement.

In witness whereof, GEORGE NV. PEN- THENY has hereunto set his hand thistwenty-eighth day of July, 1919, and VimoHnsLAv PETROVSKY has he'reuntoset his hand this thirty-first day of July, 1919.

GEORGE w. PENTHENY. YYACHESLAV PETROVSKY.

